A harsh truth

The school teacher wrote on the board:

9 × 1 = 9

9 × 2 = 18

9 × 3 = 27

9 × 4 = 36

9 × 5 = 45

9 × 6 = 54

9 × 7 = 63

9 × 8 = 72

9 × 9 = 81

9 × 10 = 89

When we saw the children after writing, the children were laughing at the teacher, because the last line was wrong.

Then the teacher said:

“I have written the last line wrong for some purpose because I want to teach all of you a very important thing."

The world will treat you like this ..!

You can see that I have written the correct answer above 9 times, but nobody praised me .. ??

"But you laughed and criticized me for my only mistake. "

So this is the advice:

"The world will never appreciate your millions of good works, but will certainly criticize a mistake made by you."

This is a harsh truth